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journalctl: add --output-fields= (#7181)

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This option allows restricting the shown fields in the output modes that
would normally show all fields. It allows clients that are only
interested in a subset of the fields to access those more efficiently.
Also, it makes the resulting size of the output more predictable.

It has no effect on the various `short` output modes, because those
already only show a subset of the fields.
This commit is contained in:
Lars Karlitski
2017-10-27 12:10:47 +09:00
committed by Yu Watanabe
parent a8caf8b251
commit cc25a67e2a
6 changed files with 122 additions and 24 deletions
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src/journal-remote/journal-gatewayd.c
+1 -1
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@@ -225,7 +225,7 @@ static ssize_t request_reader_entries(
return MHD_CONTENT_READER_END_WITH_ERROR;
}
r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL);
r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL, NULL);
if (r < 0) {
log_error_errno(r, "Failed to serialize item: %m");
return MHD_CONTENT_READER_END_WITH_ERROR;